Optimization of ultrafiltration as pre-treatment for seawater RO desalination

Brover, Semion; Lester, Yaal; Brenner, Asher; Sahar-Hadar, Eyal

doi:10.1016/j.desal.2021.115478

Cited by 21 publications

(7 citation statements)

References 21 publications

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“…Several developments are similar in FO and RO in seawater desalination. UF can be used as an effective pretreatment before FO, with addition of ferric chloride coagulation to improve filtration performance [ 66 ]. Similar strategies are also employed to reduce membrane fouling, such as pre-treatment, membrane surface modification and choice of appropriate operating conditions [ 20 ].…”

Section: Ro Desalinationmentioning

confidence: 99%

Classical and Recent Developments of Membrane Processes for Desalination and Natural Water Treatment

Charcosset

2022

Membranes

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Water supply and water treatment are of major concern all around the world. In this respect, membrane processes are increasingly used and reported for a large range of applications. Desalination processes by membranes are well-established technologies with many desalination plants implemented in coastal areas. Natural water treatment is also well implemented to provide purified water for growing population. This review covers various aspects of desalination: membranes and modules, plants, fouling (scaling, biofouling, algal blooms), cleaning, pretreatment (conventional and membrane treatments), energy and environmental issues, renewable energies, boron removal and brine disposal. Treatment of natural water focuses on removal of natural organic matter, arsenic, iron, nitrate, fluoride, pesticides and herbicides, pharmaceutical and personal care products. This review underlines that desalination and natural water treatment require identical knowledge of membrane fouling, construction of large plants, cleaning procedures, energy and environmental issues, and that these two different fields can learn from each other.

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Section: Ro Desalinationmentioning

confidence: 99%

Classical and Recent Developments of Membrane Processes for Desalination and Natural Water Treatment

Charcosset

2022

Membranes

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“…Specifically, pressure-driven membranes are used for a variety of applications, including turbidity removal (microfiltration, MF), bacteria and virus removal (ultrafiltration, UF), water softening (nanofiltration, NF), and seawater desalination (reverse osmosis, RO) . Also, UF membranes are commonly used to pretreat water before RO systems to prevent bacteria fouling of the RO membranes. , However, this leads to the UF membranes being susceptible to the foulants in the water . One key foulant in many water types is bacteria.…”

Section: Introductionmentioning

confidence: 99%

“…1 Also, UF membranes are commonly used to pretreat water before RO systems to prevent bacteria fouling of the RO membranes. 2,3 However, this leads to the UF membranes being susceptible to the foulants in the water. 3 One key foulant in many water types is bacteria.…”

Section: Introductionmentioning

confidence: 99%

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Nanopatterning Reduces Bacteria Fouling in Ultrafiltration

et al. 2022

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This contribution describes a method to reduce bacteria fouling on ultrafiltration membranes by applying nanoscale line-and-groove patterns on the surface of membranes. Nanoimprint lithography was used to pattern the polysulfone membrane surfaces with a peak height of 66.2 nm and a period of 594.0 nm. Surface characterization using scanning electron microscopy and atomic force microscopy confirmed that patterning was successful over the entire stamped area of the membrane. Water permeance tests determined that the permeance decreased by 36% upon patterning. Static batch experiments that explored the attachment of Escherichia coli K12 cells to the membranes demonstrated that the patterned membranes had a 60% lower attachment of microbes than the nonpatterned membranes. Dynamic bacteria fouling experiments using E. coli cells showed that the patterned membranes had a higher flux recovery ratio (88%) compared to the nonpatterned membranes (70%). On the basis of these studies, we suggest that patterning membranes can reduce the initial attachments of microbial cells and that different pattern sizes and shapes should be investigated to gain a fundamental understanding of their influence on bacteria fouling.

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“…Researchers have attempted to predict the level of fouling by using mathematical models [17], either through a characterization of the fouling potential of the feed, or by the detection of the fouling conditions of the membranes [18]. An ascorbic/oxalic acid cleaning in place (CIP) has also been applied to hydraulic irreversible fouling [19], and nonconventional pretreatment systems have been examined for their efficiency in terms of improving the water quality and minimizing the overall treatment cost [20]. Because RO membranes are susceptible to physical, chemical, and biological fouling, the effective pretreatment of feedwater is a significant component of membrane systems [21].…”

Section: Introductionmentioning

confidence: 99%

Improving the Performance of the Reverse Osmosis Process with Fiber Filter and Ultrafiltration: Promoting Municipal Sewage Reclamation and Reuse for Industrial Processes

Chan

2022

Sustainability

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Wastewater reuse presents a promising solution to the growing need for the sustainable use of available water resources. The reclamation of municipal sewage through reverse osmosis can be applied for diverse uses to alleviate chronic water scarcity. In this study, a pilot plant was fabricated to measure the efficiency and the costs that are associated with pretreatment by the fiber filtration and ultrafiltration of secondary effluent from a water resource recovery facility in Taiwan. The results of this dual-membrane process meet the quantity and quality standards for industrial reuse. The pretreatment produced feedwater with a silt density index (SDI15) lower than 4.1, and with average turbidity removal rates of 42.7% (fiber filtration) and 99.2% (ultrafiltration). Following reverse osmosis, a 97.9% rejection of the electrolyte conductivity was achieved in the reclaimed water. The fouling of the membranes was controlled through the application of intensive backwash, chemically enhanced backflushing, and cleaning in place. The proposed system improves the feasibility, reliability, and economy of the dual-membrane process as a tertiary treatment for safe water reuse, and it thereby demonstrates that this technology has reached maturity for the full-scale implementation of sustainable water reuse.

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Optimization of ultrafiltration as pre-treatment for seawater RO desalination

Cited by 21 publications

References 21 publications

Classical and Recent Developments of Membrane Processes for Desalination and Natural Water Treatment

Classical and Recent Developments of Membrane Processes for Desalination and Natural Water Treatment

Nanopatterning Reduces Bacteria Fouling in Ultrafiltration

Improving the Performance of the Reverse Osmosis Process with Fiber Filter and Ultrafiltration: Promoting Municipal Sewage Reclamation and Reuse for Industrial Processes

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